I added the DIY Pro Swoop Tower to my old Four Winns 180 Horizon and couldn't have been happier with it! All the materials were very well made and it was extremely stable. At 6'3" and 210 lbs, I was able to do chin ups from it and wakeboard behind it (w2w 180s, w2w 360s, grabs, and face plants). I also installed the DIY speaker cans and board racks. It took me and a couple buddies the better part of a day to get it all installed, but it turned out great! Also, Raul from DIY was great to work with; he even answered numerous calls on Saturday while we were installing it. Here are a couple pics.

I installed the black powder coated Indy tower and am very pleased with its hidden bolt system and solid feel. And one of the few towers that are Anodized for corrosion resistance.
Has more of a swoop look than a Letter "A" look.
Liked the idea of only drilling 4 holes in my Hull instead of 16 plus.
I would post pics but there is no browse files link option for posting like many other websites have.

The front mounts I used 3/4 inch plywood epoxied in place and for the rears I glassed in 1/2 inch steel plates under the gunwales. Make sure you either run the drill bit backwards or very slowly or you will get gelcoat cracks. Also be sure to chamfer the drilled holes or you will get gelcoat cracks. So far this has worked for me.